Screening device



B. B. CARLTON ET All..

'SCREENING DEVICE Filed Nov. 1, 1918 ,QQQQQQQQQQQQQ QQQQQQQQQQQQQQQ Q QQQQQQQ Q v Q QQQ July 17, 1923.

Patented. July 117 1923.

Matte ,Partnr oratore@ r resina. CARLTON AND OLEM .TQ BURKLEY, or Axnon, OHIO, Assrono 'ro om Goon- Y TIRE a RUBBER COMPANY, 0F' AKRON, OHIO, a coaro'rron or omo.

SCREENING DEVIE.

Application iled November 1,- 1918. Serial No. 260,739.

To all wlwm it may concern:

Be it known that we, BAsrL B. CARLTON" Our present invention relates to screen construction; and more particularly to the construction of screens of the` class which,

in operation, are mechanically jarred to render them more effective in their action of se arating finely divided materials.

y reason of the bending and vibration to which they are subjected in operation, the mechanically jarred wire screens of screening machines are likely to .be weakened and broken after they have been in service for a comparatively short period lof time. The Weakness and breaks usually develop and occur near that portion of the wire screen where the sharp blows delivered to the rigid bars are immediately transferredv to the flexible wire screen, causing a quick and sudden bending or flexing.` The breaks also occur where the flexible screen is fastened to the rigid frame and where the vibration passes Aout of the movable screen into the stationary frame. LA

To prevent the weakening and breaking of the wire screen in use is the principal object of our invention, and we propose to strengthen and reinforce it by means of a flexible substance, lsuch as vulcanized rubber material, incorporated into and on both sides of that portion of the wire screen where cracking and breaking is most liable to occur. The flexible material so incorporated in the wire screen is ada ted to distribute over a large area the e ects of the bending of the wire screen, and it acts vto save lthe wire screen from the destructive ef# fects ofthe vibration and bending.

The above and additional objects of a similarnature, which will be hereinafter more specifically treated, are preferably ac-,

complished by such means as are illustrated in the acompanyin drawings, described in the following speci cation, and then moreparticularly ointed outin the claims which are appended) hereto and form a part of this ap lication.

ith reference to the drawings, wherein there has been illustrated a preferred embodiment of the invention, and throughout thel several views of which, similar refer ence numbers desi ate corresponding parte: F igureJl is a p an view of a wire screen orgauze having my invention appliedthereto;

Figure 2 is an end view ofthe same; and A y Figure 3 an enlarged sectional view taken on line 3-3 of Figure 1.

The frame 11 of the wire screen oi gauze 'ce 10 and its mounting, as well as thek jarring mechanism of thescreening machinefmay be of'any suitable form as they constitute no essentialpart of the present invention In carrying out our invention we propose Zo to incorporate along the middle and marginal edge portions of the wire screen a wel of flexible material 12. This web may be of` any suitable material but we preferably employ a rubber compound applied in sheets ,te

uponboth sides of the screen and vulcanized. This causes the compounds to run and penetrate the interstices of the screen and unite the two sheets together as will be understood.

. In case the jarring mechanism includes the f usual steel bar 14 having thereon projections 15 which are intermittently struck by tappets, (not shown), or the like, the bar la is preferably disposed along the` middle por tion of the web 12 and a strip or mat 16 of cotton or other suitable fabric is inter osed between these two elements as clearl s own inl Figs. 2 and 3 of the drawings. 14 may secured in placeA by any suitable means, that shown oonsistinl ofa imetal. strip 18 placed on a mat 19 o fabric. rlhis latter element is arranged on the face of the web 12 opposite to the face on which the mat 16 and the bar 14 are positioned. A. plurality of small bolts 20, pass through the elements 18, 19, 12, 16, 14 and are provided with washers 21 and clamping nuts 22 for effectively clamping all of the elements together. l

We have also found .it ypractical and ex- 'pedient to reinforce in a like manner the marginal edge portions of thev screen, as shown at 23, particularly `along the edge portions gripped or engagedr by 'the frame forming the support for lthe entire screen. Here too the vioration and strains are erf perienced, only in a manner reversed from the middle section, as, in this instance the vibrations are transferred from the dexible he'bar y OES nes

screen to a stationary member, .while in the center the vibrations are passed out froma rigid member (the tappet bar)I to the flexilife of the wire screen in service and it is to be understood that other materials and arrangements otherV than those shown and described/may be used without departing from the spirit of my invention, or from the scope of the appended claims.

What we claim is:

l. A devicefor separating finely divided material comprising a screen partially supported by and embedded in a flexible material.

2. A screen for separating finely divided material, provided with a rubber compound incorporated therein for the purpose set forth. i

i 3. A screen for separating finely divided material, having a' web of 'flexible material along its middle portion for the purpose set -forth.

4. A screen for separating finely divided material, having a web of vulcanizedvrubber material incorporated in the middle portion or the screen for the purpose set forth.

5. A screen for separatin finely divided material, having a web of exible material along its middle portion, and having its meaaee marginal edge portions reinforced with vulcanized rubber material.

6. A screen for separating finely divided material, having a web of vulcanized rubber material incorporated in the middle portion of the screen, and having vulcanized rubber material incorporated in the edge portions ofthe screen.

7. A screen for separating finely divided material having means incorporated therewith for absorbing the vibration comprising oppositely disposed strips of vulcanizable material arranged intermediate the edges or" the screen, said strips being vulcanized together to imbed the screen therein.

8. A screen for separating finely divided material having means for absorbing the vibration incorporated therewith comprising oppositely disposed strips 4of vulcanizable material arranged intermediate the edges of the screen, said strips being vulcanized to- -gether to imbed the screen therein, anda metallic strip superposed upon one of said strips in fixed relation thereto.l

ln Witness whereof, We have hereunto signed our names in the presence of two subscribing witnesses.

BASlL B. CARLTON. @LEM J. BURKLEY.

' Witnesses:

B. d. MCDANEL, E. C. LEADENHAM. 

